{"code":"C172948","name":"Hemoglobin F","terminology":"ncit","version":"26.09d","conceptStatus":"DEFAULT","leaf":true,"active":true,"synonyms":[{"name":"Hb F","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"caDSR"},{"name":"Hemoglobin F","termType":"DN","type":"FULL_SYN","typeCode":"P90","source":"CTRP"},{"name":"Fetal Hemoglobin","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Hb a2g2","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Hb F","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Hemoglobin Alpha2Gamma2","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Hemoglobin F","termType":"PT","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Hgb F","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Hemoglobin F","type":"Display_Name","typeCode":"P107"},{"name":"Hemoglobin F","type":"Preferred_Name","typeCode":"P108"}],"definitions":[{"definition":"A tetrameric complex of 2 molecules of hemoglobin subunit alpha (encoded by either the HBA1 or HBA2 gene) and 2 molecules of hemoglobin subunit gamma (encoded by either the HBG1 or HBG2 gene).","code":"P97","type":"DEFINITION","source":"NCI"}],"properties":[{"code":"P322","type":"Contributing_Source","value":"CTRP"},{"code":"P98","type":"DesignNote","value":"Hemoglobin F is expressed by fetal red blood cells and its production drops soon after birth and reaches levels found in adults within 1 to 2 years. In adults, hemoglobin F accounts for less than 2% of the normal erythrocyte hemoglobin in adults."},{"code":"P106","type":"Semantic_Type","value":"Amino Acid, Peptide, or Protein"},{"code":"P207","type":"UMLS_CUI","value":"C0015936"}]}